|Orbit||semi-major axis 2.788 AU, eccentricity 0.187|
|Political Affiliation||Fenspace Convention|
|Government||Absolute monarchy (private property of The Jason)|
519 Sylvania is an asteroid in the Main Belt, discovered on 20 October 1903.
Rather than risk widespread ecological catastrophe from experiments gone horribly wrong, the Belters decided to give title to a single asteroid to The Jason, on the understanding that he wouldn't experiment on any of their rocks. 519 Sylvania is the asteroid they chose.
Rumors say you can already see "bonsai sakura" on the asteroid's surface if you look hard enough.